Music is PRACTICALITY as well. For kids finding what they're attuned to. So for example the worldwide popularity of the Ukelele (from that Musical Imperialist Island Hawaii!) demonstrates this. Thus diversity is only a secondary vehicle, not the causative reason for expanding the music curriculum and seeing success. Our hearts beat like drums thus the drum is inevitably a simple and practical musical instrument that potentially accords and attunes with more people than not. I know I prefer a good drum to a lot of classical music! In fact making music for oneself is as important as listening to music eg Beethoven and they're likely very different requirements: The former simple instruments will more than suffice and in fact such gainful activity will more than overall reward than listening to Beethoven no matter how delightful such music can be or Sidney Bichet for Jazz if one prefers... Again in Science: 1) Body of Knowledge that guides us - yes 2) Means of Investigation of Phenomena and Self - more important than 1) to teach imho. Bit like the above music example. I gave the example of friction to a student by saying when you are moving on your bike and you put the breaks on then stop then touch your front wheel - did you ever do that and feel it was hot... Btw some on this thread I really appreciate your commentary and careful elaboration. Thanks.